Like other AAS, boldenone is an agonist of the androgen receptor (AR).  The activity of boldenone is mainly anabolic , with a low androgenic potency. Boldenone will increase nitrogen retention, protein synthesis, increases appetite and stimulates the release of erythropoietin in the kidneys.  Boldenone was synthesized in an attempt to create a long-acting injectable metandienone , for androgen deficiency disorders. Boldenone acts similar to metandienone with fewer adverse androgenic effects. [ medical citation needed ] Although commonly compared to nandrolone , boldenone lacks progesterone receptor interaction and associated progestogenic side effects.
In February 2017, American triathlete Beth Gerdes was given a 2-year suspension for presence of ostarine, and American triathlete Lauren Barnett was given a 6-month suspension for the presence of Ostarine. Both triathletes claimed contamination from salt tablet supplements. Lauren Barnett was able to provide tablets and sealed bottle tablets which both tested positive for contamination, thus only the 6-month suspension. The 2-year suspension still stands for Beth Gerdes who provided tablets for testing, but tests showed only low levels of ostarine not high enough to confirm the finding. 
The effects of Parabolan do not end with cutting and mass promotion. This steroid will promote enhanced muscular endurance better than most steroids. It will also dramatically improve the individual’s overall rate of recovery. The individual will not tire out as fast and he will recover from hard, intense exercise or activity at an accelerated rate. Due to the powerful androgenic activity, the individual will find this steroid also greatly promotes increases in strength. In fact, some may even notice a slight increase during a cutting phase. Of course, most all will find strength diminishes to a degree when cutting, but more of it will be protected when dieting than would be otherwise. Due to these effects of Parabolan, enhanced endurance, recovery and strength, it can be a fantastic steroid for athletic performance. However, some individuals report decreases in cardiovascular endurance. However, it WILL NOT affect everyone this way. Many will simply enjoy the positive effects of Parabolan.